Trouble Shooting Guide - Houghton Cool Top Trail 34 Operating And Installation Instructions

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Trouble shooting guide

Symptom
No air distributor display
when unit turned ON.
Cooling not available.
Heating not available.
Poor cooling capacity.
Water dripping out of air
distributor
Fault codes displayed on
the panel:
-
E0
E1
E2
E3
E4
E5
dF
Cool Top Trail 34
Remedy
Check whether:
X
– the power is supplied to the vehicle and circuit breakers are on.
– the remote control battery is OK.
– the remote control is off.
– the voltage is too low.
– the amperage of the circuit breaker in the external power supply is too low.
Check that the cooling mode is selected and the air distributor display shows
X
Use the remote control to set required temperature below the current room tem-
X
perature.
The compressor will delay a re-start for three minutes.
Check that the heating mode is selected and the air distributor display shows
X
Use the remote control to set required temperature above the current room tem-
X
perature.
More time would be needed for starting heating under extremely cold condition.
When the unit is in heating mode and the outside temperature is very low the unit
may automatically enter defrost mode. The heating will temporarily stop as the
unit warms the outside heat exchanger to remove any frost & ice. Heating will re-
sume once the outside heat exchanger has been cleared. During defrost the unit
will display "dF".
Make sure the filter is clean.
X
Increase the fan speed to high to obtain the maximum capacity.
X
Make sure all the doors and windows as well as the sunroof are closed.
X
Use curtains and awnings to decrease the heat load.
X
Check that the air openings of outdoor unit are not soiled or blocked.
X
Unblock condensate outlets of outdoor unit.
X
Check seal of the adaptor frame.
X
Park the vehicle in a more horizontal position, with an angle < 5° (8,8%).
X
Increase the fan speed to high if condensate forms on the outside of the air dis-
X
tributor.
In case there is "0" or a jumbled display while on generator supply this may indi-
cate unstable voltage and current.
Communication fault.
Room temperature sensor fault.
Indoor heat exchanger temperature sensor fault.
Outdoor heat exchanger temperature sensor fault.
No cooling effect. Possible root causes are:
– Insufficient refrigerant amount due to piping fracture.
– Compressor fault.
– Sensor failure.
Outdoor heat exchanger temperature too high / Temperature anomaly.
Temperature anomaly: outdoor heat exchanger temperature too high when cool-
ing or too low when heating. (When cooling, the display of E5 indicates the out-
door temperature exceeds 68°C. It is likely due to the reduction of air flow of the
condenser, poor working of the condenser fan or sensor failure; when heating, if
the outdoor temperature is higher than 18°C, the external air fan may be on and
off repeatedly. The occurrence of this is not a fault, but the self protection of the
system to avoid overheating of the unit.)
Not a fault: When operating on heating mode in low ambient temperatures the
unit will periodically defrost the outside heat exchanger. The air distributor display
shows "dF" during defrost operation and then returns to heating once the defrost
is completed.
.
.
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